Tanksmith

Tanksmith is a local-first logbook for reef aquarium keepers.

The app requires no account and has no in-app cloud sync, ads, subscription, or analytics.

TRACK THE DETAILS THAT MATTER
• Add display, frag, or quarantine tanks
• Log alkalinity, calcium, magnesium, nitrate, phosphate, salinity, temperature, and pH
• See your latest readings and chart their history
• Keep livestock records with species and placement notes
• Track equipment and service intervals so overdue maintenance is clear
• Switch between gallons/°F and liters/°C

READING TRENDS AND REPORTS
Tanksmith Pro calculates the daily equivalent of the change between your latest two alkalinity, calcium, and magnesium readings. It is an observed-change summary, not a dosing recommendation or prediction. Additions, water changes and testing variation can affect the result. Generate a Tank Report PDF with tank details, the latest reading for each parameter, livestock, and equipment for your own records or to share when asking a community for help.

START FREE
The free app includes one tank, 40 parameter readings, and three livestock entries per tank.

ONE-TIME PRO UNLOCK
Tanksmith Pro is a one-time purchase. It unlocks unlimited tanks, readings, and livestock, plus recorded-change trends and Tank Report PDFs. No subscription.

YOUR RECORDS
Tanksmith itself does not transmit your aquarium records to a developer server. Depending on your Android backup settings, the operating system may back up app data. Google Play handles purchases through its billing service.